516521172 has 24 divisors (see below), whose sum is σ = 1206174816. Its totient is φ = 172036768.

The previous prime is 516521167. The next prime is 516521177. The reversal of 516521172 is 271125615.

It is an interprime number because it is at equal distance from previous prime (516521167) and next prime (516521177).

It is a super-2 number, since 2×516521172² = 533588242248507168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516521177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783 + ... + 32150.

It is an arithmetic number, because the mean of its divisors is an integer number (50257284).

Almost surely, 2^516521172 is an apocalyptic number.

It is an amenable number.

516521172 is an abundant number, since it is smaller than the sum of its proper divisors (689653644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516521172 is a wasteful number, since it uses less digits than its factorization.

516521172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34247 (or 34245 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 516521172 is about 22727.1021469962. The cubic root of 516521172 is about 802.3478796686.

Adding to 516521172 its reverse (271125615), we get a palindrome (787646787).

The spelling of 516521172 in words is "five hundred sixteen million, five hundred twenty-one thousand, one hundred seventy-two".